neighbour



Sept. 4, 1923. 1.467.062

' A. G. L. NEIGHBOUR "MAGNETO ELECTRIC IGNITION MACHINE Filed April 2, 1923 llll llllm!w u JWMLAJ ww am Patented Sept. 4, 1923 UNITEDY'STATE'S/ ARTHUR G. L. -NEIGHBOUR, 0F BRIGHTCN, VIGTORLL AUSTRALIA.

MAGNE Ton noTnIo renrrron viacnrnn, 7

Application filed April To all whom it may concern: 7

Be it known that ARTHUR Gnonen LLOYD Nnierrnonn, a subject of the King oi Great Britain, r esiding at 1 Oak Grove, Brighton, in the State of Victoria, Commonwealth ot Australia, has invented certain new and use ful Improvements in onRelating to Magneto-Electric Ignition Machines, of which maximum values and refers'rnore especially to interrupters or contact breakers o f'said inachines. f p I H j The object of the present invention is to provide an interrupter or contact breaker of simple construction which can be readily adapted tofunction elficiently in' either direction of rotation of a magneto as commonlY'GD'iPlOYQCl for 1gniti'onpurposes in internal combustion engines;

Reference being had to trating the invention:

Figure 1 is a view in end elevationof an interrupter constructed in accordance w-ith the invention.

Figure 2 is a view in sectional elevation taken on the dotted line II-II of Figured.

In these drawings the numeral52 designates a contact breaker base plate" which is secured to a contact breaker shaft 5-1 in the usual manner by acentral screw 66 which bears upon and passes through an insulated metal block' 67 mounted on the said base plate 52. This screw 66 is axially disposed within and insulated from the contact breaker shaft 51, and at itsinner end said screw engages with a'fixed insulated member connected with the primary winding of the armature of the machine. I

The insulated metalblock 67 is accordingly electrically connected with the outer end of the primary winding at all times. Said insulated block 67 is constructed with two radial branches 72 which are disposed on opposite sides of a diametral plane with which said branches make equal angles.

Screws 73 are passed through and insulated from the base plate 52, and these screws engage with tapped holes in the branches 72'of the insulated block 67. By means of the screws 7 3 said insulated block the drawings illus- 1923. semi nmseasai,

EN'T oFFIC is fixed securely to the base plate 52 even when the central screw cc'is removed.

said axis, is positioned a pivot 74, which is securely fixed in the base plate 52.

On h P Ot 74 is mounted a bush 75 of" i insulating inat erial which tornis 'a bearing for the contact breaker lever 7 6." This lever isof the usual bell crank construction have In said diametral plane and on the side of f c the axls of rotation reinote from the v c branchesf72 and at a required distance from inga fibre wiper 77 atone end and a con-' tact 78-, hereinafter reterredto'as the movable contact at the opposite end.

between the branches 72, isanfoutwardly v 83" to 1 which is attached one 1 7 projecting lu end of a. spring 8 L by asciew-85. The spring A cooperating 'contact 79termed the sulfated contact is mounted on the screw 80 S4 at its opposite "end" isattached to said lever 76 by ascrew 86. Said spring 84:

; functions, in "the; usual manner to maintain the mo'vable" contact 7 8'upon the'insulated contact'79.

A hole is made through the bossof the lever 76, and thishole is made of such diameter that it fits neatly the exterior of the bush 75. v An insulating washer 88 is interposed between the lever 76 and the base plate 52.

A fiat s )rin 89 bears-u ion the outer end of the hush and retains the latter and V the lever 76 in place upon the pivot 74., The central screw 66 passes through a hole inade inthe opposite end of the spring 89 and the latter is clamped between the head of said screw and the insulated block 67, but not so tightly as to prevent its being turned aside when it is necessary to remove the lever 76. V i The movable contact-78 is separated from the insulated contact'79 in theusual manner, by impact of the fibre wiper 77 with cams 9O fixed concentrically around the contact breaker. V I

The contact breaker above be quickly adjusted to operate in either direction of rotation with equal efiiciency.

- It is imperative for efiicient operation of described can a contact breaker that the fibre wiper 77 should trail behind or follow the pivot 7-1l ot the contact breaker lever 76 during rotation. It the fibre wiper 7'? leads or moves in advance of the pivot 7 the former will wear and chattering of the lever will occur and undue wear of the bush 7:) will result.

In Figure 1 the contact breaker is shown adjusted for operation in a clockwise or riglit-hainled direction when viewed as custonrar from the opposite end or driving end of the 1nagne'to.- I

The lever "2'6 having no lateral projections and being synnne rically supported on the bush 75 may be removed from the pivot pin 74: and turned over so as to bring its respective arrnsint'o precisely similar positions on opposite sides of the diametral plane passing through the pivot pin 74 and the wringsupporting lug 83. The spring s4 is adjusted to extend from the opposite side of the lug 83 and the screw 80 bearing, the insulated contact 79 is transferred to the hole 81 in the other branch 72 of the insulated block 67.

It will. be observed that the various parts after reversal and transference, take up exactly similar positions onthe opposite sides of the diainetral plane ll'lGlllZlOlltXl above. Atter zuljustn'ient o'tlthe insulated contact 79 has been effected to give the required break or distance between the contacts 78 and 79 when separated, it .will he found that; the contact breaker will operate in the opposite (lllftClI-lOI] of rotation with equal efficiency.

It will be obvious to persons skilled in the art, that a contact breaker constructed in the i manner above described has a considerable advantages over the usual type of contact breaker, for in addition to the ease with which it may be altered to operate in either direction, it simplifies manufacture in that only one contact ln'eaker required instead of two suited respectively to clockwise and anticlockwise directions of rotation.

I claim In a magneto, a reversible contact breaker having a base plate, a substantially V-shaped insulated block concentrically mounted on the base plate, a pivot on the base plate on the opposite side of the axis thereot to that on which the radial branches are situatedand positioned in a dian'ictral plane which passes between the radial in'anches oil the V-shaped block, an insulating washer positioned around the pivot and bearing on the base plate, a eup-shaped insulating bushing covering the exposed portion of the pivot, said bushing being shouldered on its exterior, a reversible contact carrying lever mounted on the reduced portion ol said bushing and aihmted to oscillate trrcly tl'iereabout, means for securing a (Ofltrfl'll to either oi. the radial branches of the V-shaped block, a fixinq screw for securing the V- shaped block in place, and a spring rigidly secured at one end by the tiring srr -v-r and having" its other end bearing on the cup shaped bushing; to maintain said bushing and contact carrying lever in position. i

In testimony whereot T ailix my signature.

ARTHUR G. L. NETGIIBUUR.

V i tnesses I VVILL'IAIW A. .AsIIToN, J. C. lWANsrinLn, 

